Perhaps you should try some spelling variations:
"interdisciplinary approach mathematics" » "multidisciplinary approach mathematics", "interdisciplinary approaches mathematics", "interdisciplinary approaches mathematical", "interdisciplinary applied mathematics"
"interdisciplinary approach mathematical" » "multidisciplinary approach mathematical", "interdisciplinary approaches mathematical", "interdisciplinary appendix mathematical", "interdisciplinary through mathematical"
"interdisciplinary applied mathematical" » "interdisciplinary analyses mathematical", "interdisciplinary aspects mathematical", "interdisciplinary area mathematical", "interdisciplinary applied mathematics", "interdisciplinary appendix mathematical", "interdisciplinary advanced mathematical"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("interdisciplinary approach mathematics") OR ((("interdisciplinary approach mathematical") OR ("interdisciplinary applied mathematical"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"interdisciplinary approach mathematics\") or (((\"interdisciplinary approach mathematical\") OR (\"interdisciplinary applied mathematical\"))))*".
• Removing quotes may allow a broader search: (( interdisciplinary approach mathematics ) or ((( interdisciplinary approach mathematical ) OR ( interdisciplinary applied mathematical ))))*.